Arithmetic coding-based order-preserving encryption system and method

Abstract

The invention relates to an arithmetic coding-based order-preserving encryption system and method. The system comprises a data initialization module, an index construction module, a data encryption and decryption module and a test module; the data initialization module is used for firstly preprocessing original data and carrying out bit filling on all the data; the index construction module is used for coding the data in an arithmetic coding mode according to the result of the data initialization module by utilizing the sub-interval determined by P (i) to construct an index; and the data encryption and decryption module is used for encrypting and decrypting the data by utilizing an AES. In the index construction stage, in order to improve the construction speed and ensure the safety of data indexes, an index construction mode based on the arithmetic coding principle is provided; and in the plaintext encryption stage, the data is encrypted by adopting an AES algorithm. According to the method, the numeric data can be subjected to order-preserving encryption, the comparison operation is allowed to be directly applied to the encrypted data, and the data security of a user can be effectively protected.

Description

Technical field [0001] The present invention relates to a system and method for order-preserving encryption arithmetic coding based on cloud security, and more particularly relates. Background technique [0002] With the continuous development of the Internet, cloud computing has become one of the hotspots of the current field of information technology. Cloud computing in order to facilitate economic, highly scalable features to attract a large number of users, but the privacy of cloud computing has been cause for concern, despite the cloud service provider will take appropriate protective measures, but it still has full authority to operate on the data. Encryption is an important way to protect data security, data privacy issues can be resolved, but it will significantly reduce user operating efficiency and weaken the benefits of cloud computing. [0003] Search operation is one of the most basic plaintext data processing, searchable encryption technology will be the key to achi...

AI Technical Summary

Problems solved by technology

Existing solutions have the problems of low efficiency and poor security, and cannot achieve a good balance between the two

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